EM-1111
Rate and average speed
E Math · Secondary 3 · Hard · Rate and average speed
Car A travels at a constant speed of 70 km/h and Car B travels at a constant speed of 90 km/h. Both cars start from the same point at the same time and travel in the same direction. How long will Car B take to be 40 km ahead of Car A?
- 1 hour
- 1.5 hours
- 2 hours
- 2.5 hours
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